Work on using providers to make the resources more natural-looking
Use a Jersey provider to deserialize incoming Bundle objects. For some
reason serializing permission objects is not working yet.

Conflicts:
	ehri-extension/src/main/java/eu/ehri/extension/CvocConceptResource.java
	ehri-extension/src/main/java/eu/ehri/extension/GroupResource.java
	ehri-extension/src/main/java/eu/ehri/extension/PermissionsResource.java
	ehri-extension/src/main/java/eu/ehri/extension/UserProfileResource.java
	ehri-extension/src/main/java/eu/ehri/extension/VirtualUnitResource.java
	ehri-extension/src/main/java/eu/ehri/extension/VocabularyResource.java